Actually, to follow that up, if you replace "Song Princesses" to "Divas" first, then "Song Princess" to Diva", that would be faster. However, I doubt that in effects "Song Princesses" will appear, since it's usually "Song Princess" family Spirit etc.

Oh yeah, I saw on Twitter there will be Grandwalker Chaos and True-Exe-Gale-Ceed (fuck). Looks like they're going back one step further, since Chaos is the main titan (the generaiton before the Greek gods).